Floating tool-chuck



C. H. ALLEN.

FLOATING TOOL CHUCK. APPLICATION FILED MAR. 16. I918.

1,322,474, Patented Nov. 18, 1919.

WITNESSES INVENTOR (fiqrles jig [Z612 CHARLES H. ALLEN, orrrrrsmmen,PENNSYLVANIA.

FLOATING TOOL-CHUCK.

To all whom it may 00mm Be it known that I, CHARLES H. AILEN, a citizenof the United States, residing at Pittsburgh, in the county of Alleghenyand State of Pennsylvania, have invented certain new and usefulImprovements in Floating Tool-Chucks, of which the following is aspecification.

This invention relates to improvements in drilling and boring apparatusand particularly to such type of devices adapted for drilling or boringpolygonal holes.

The primary object of this invention is to provide a drilling or boringdevice of the type set forth for holding and operating a drill orcutting tool in such mannerthat the vibration of certain parts of thedevice will permit the cutting edge of the drill or tool to travel andoperate in the path corresponding to the lines and angles of anypolygonal figure.

Another important object of this invention is to provide a device of thecharacter described which will operate the cutting tool eccentricallywith respect to a piece ofwork.

Further objects of this invention are to provide a drilling or boringdevice of the type specified which is simple in its construction andarrangement, strong, durable and eiiicient in its use, readily set upfor use, consists of comparatively few parts and inexpensive tomanufacture.

To the accomplishment of these and such other objects as may hereinafterappear, the invention consists of the novel construction,

- combination and arrangement of parts herein specifically described andillustrated in the accompanying drawing, wherein is shown an embodimentof the invention.

In the drawing forming a portion of this specification and wherein likenumerals of reference designate corresponding parts throughoutthe'several views:

Figure 1 is a side elevation of a device for drilling or boringpolygonal-shaped openings in accordance with this invention, with aportion shown in cross section- Fig. 2 is a bottom View of the shankmember.

Fig. 3 is a plan view of the locking ring.

Fig. 4: is a cross sectional view on the line 0JIJ, Fig. 3.

Specification of Letters Patent.

Fig. 5 is a top plan view of the drill member.

Fig. 6 is an end view of the driving element. a

Fig. 7 is a side elevation of the driving element. 7

Fig. 8 is a perspective view of the guide member.

Fig. 9 is a cross sectional view of the cutting tool on line y-y, Fig.1.

Referring more in detail to the drawing there is shown in Fig. 1 adevice for drillmg or boring polygonal-shapedv openings and comprisingthe shank member 1 flexibly connected to the drill member 2 by theinterposed links 3. Y

The shank member 1 is formed integrally with the usual tapered shank 4for chucking the drilling device in the machine, and the drill member 2is provided with the chuck 5 for attaching the cutting drill or tool 6to the drill member.

The lower portion of the shank member 1 comprises a circular disk 7having a centrally disposed and integrally formed depending sleeve 8which is provided with a rectangular recess 9, extending into the disk 7for the purpose here'nafter described. The upper portion of the drillmember 2 also comprises a circular disk 10 which has 12 formedtherewith, member 1..

relative to the shank Rotation is transmitted by the shank member 1 tothe drill member2 by means of the driving swivel 13, the heads 14 and 15of which are adapted to engage in the rectangular recesses 9 and 12,respectively. The driving swivel 13, as illustrated in Figs. 6 and 7',is so shaped and constructed as to permit universal movement of theshank member 1 and the drill member 2 with the exception of rotation, asthe heads 1 1 and 15, of the swivel, at the point of contact 16 with thewalls of the rectangular recesses 9 and 12, are rectangular in crosssection.

The lower face of the shank member disk 7, and theupper face of thedrill member disk 10 are provided with the spherical depressions 17 inwhich are adapted to seat the enlarged spherical ends 18 of the links 3.The spherical ends 18, of the links 3, are

p PatentedNov.18,1919. Application filed March 16, 1918. Serial No.222,815.

mounted and locked in their seats by the locking rings 19, which areprovided with the key-shaped openings 20, permitting the passage of thespherical ends 18, and communicating with smaller spherical openings 21which register with the spherical depressions 17 to complete the seatfor the link ends 18.

The locking rings 19 are secured to the disks 7 and pass throughapertures 22 in the disks, and which have a threadable connectionthrough the apertures 23, in the-locking rin 19.

The shank member 1 and ber 2 are normally held in alinement and centeredby the action of the spiral coil .spring'24' which embraces and inclosesthe disk portions of the shank member and the drill member, and theassociated interposed parts.

The caps 25,

of the shank and drill members by the screws 26, overlap the ends of thecoil spring 21' and hold the same in secured position.

It will be readily apparent that with the shank 4, of the device,fixedlychucked in a of the drill member will permit universal lateralmovements to the drill member 2 relative to, the shank member 1, but novertical movements, and that rotation may be efficiently impartedthereto, by the driving swivel 1'3, regardless of such lateralmovements.

The drilling or cutting tool used in connection with the device hereindescribed must necessarily be constructed for drilling polygonal holes,and the contours of the openmgs must be defined by employing a guidemember provided with a polygonal opening identical to that to make. Thedrilling or cutting tool when operating upon a piece of workrequires oneI vless lip or flute t of the opening: For example, when drilling atriangular-shaped opening having ply act as an the number of walls three-walls, b 'ut two lips or flutes are emm Figs. '1 and 9, has three lipsor flutes 27 and is designed for drilling rectangularshaped openmgs.

The lips or flutes 27 are cut divide the periphery of the'body member 6equa the chips or cuttings to pass out freely. The end of the cuttingtool 6'or drilling member has lips or flutes whichconform with thoseprovided on the cutting edge of the tool. The flutes or lips 27 onthe'periphery of=the cutting tool simguides and follow the angularity ofthe polygonalshaped opening in the to radially of the drill guide member28, which isshown in Fig. 8

as rectangular-shaped. Y Y

The guide member 28, having a polygonal shaped opening 29 10 by means ofscrews which v the flutes the drill memsecured to the disk portions,

which it is desired each other.

ly, anddeep enough to allow.

periphery and forms the consists of a flat plate and during the drillingoperation the guide member is clamped .to the work,-which with the saidguide member remains stationary and-the cutting tool 6 operates throughthe opening 29. During a boring operation the Wor with the guide member28 revolves around the drilling device which in this instance is'fixedlyheld in the bormg machine;

The lateral shifting movements of the drill member 2 relative to theshank member 1 as hereinbeforedescribed, which forces 27 of thecuttingtool 6 to follow the contour of the polygonal-shaped opening 29in the guide member 28 is well understood and does not require a moreextended eX planation.

From the foregoing description taken in connection with the accompanyingdrawings, the advantages of the construction and the method of operationwill be readily parent to those skilled in the art to which theinvention appertains, and while describing the prlnciple of operation ofthe invention together with the device whichis now considered to be thebest embodiment thereof, it is to be understood that the de- Vice shownis merely illustrative and that variouschanges in the form, proportionand the minor details of construction may be re-' sorted to withoutdepartin from the principlc or sacrificing any of t e advantages of theinvention as defined in the appended] claims.

What I claim as new by Letters Patent isz' l. A drilling devicecomprising a shank member, a drill member, links flexibly connecting thesaid'members together, means for driving the said drill member in unisonwith the said shank member andallowing lateral independent'movementsof'the said and desire to secure drill member, and a coil springyieldably forcing the said members in alinement with 2. A drillingdevice comprising a shank member, a drill member, a driving elementconnecting the said members together for movement together and allowinglateral movements of one of the said members, and yieldable flexiblemeans for connecting the said members together, said yieldable flexiblemeans including, a coil spring connected to both of said members. y

A-drilling device comprising a shank member, a drill member, means fordriving the said drill member from the said shank member and allowingindependent lateral I movements of the said drill member, links having adetachable connection with both of sa1d members, and a coil springarranged concentrically of the center of the said members and connectedto both of said members.

4. A drilling device comprising a shank member, a drill member, linkshaving spheri- 130 cal ends, means engaging the said ends and connectedto the said members for allowing the said links to oscillate, a drivingelement held in engagementwith both of said members bysaid means, and acoil spring connecting the said members together for the purpose setforth.

5. A drilling device comprising a shank member, a drill member, linkshaving spherical ends, plates inclosing the spherical ends and connectedto the said members, a flexible connection between the said members, anda coil spring connected to ,the said members for the purpose set forth.

6. A drilling ber having spherical depressions and a shank extendingtherefrom, a second member constructed to support a drill and providedwith spherical depressions, links each having spherical ends engagingsaid depressions, a ring connected to each of said members andconstructed to hold the spherical ends of the said links in saiddepressions, a driving element arranged between the said members and ofa construction to prevent independent rotative movement of the saidmembers but allowing lateral movements of one of said device comprisinga mem-,

members, and a coil spring arranged concentrically of the said rings andconnected to the said members.

7. In a drilling device as described, a plate having sphericaldepressions, a ring having key-shaped openings communicating withbeveled seats, a pair of members each having spherical depressions, anda link having an enlargedspherical end adapted to pass the key-shapedopening and be arranged in said seat/and depression in the said member.

8. In a drilling device as described, a pair of members each havingspherical depressions and each provided with a rectangular recess, linkshaving spherical ends arranged in-the said depressions, and a drivingele ment curved in predetermined directions exteriorly and of arectangular shape in cross section and seated in said recesses for thepurpose set forth.

In testimony whereof afiix my signature in the presence of twoWitnesses.

R. CLEMENT WEBER, J EN NIE JONES.

